This should play if your Web browser has WebAssembly enabled (most do). Most examples will play unless they need to load files. The first time you click Play, Csound will spend a few seconds loading, then play. You can edit this code and replay it.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac ;;;realtime audio out ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o sandpaper.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 44100 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 instr 1 idmp = p4 a1 line 2, p3, 2 ;preset amplitude increase a2 sandpaper 1, 0.01, 128, idmp ;sandpaper needs a little amp help at these settings asig product a1, a2 ;increase amplitude outs asig, asig endin </CsInstruments> <CsScore> i1 0 1 0.5 i1 + 1 0.95 e </CsScore> </CsoundSynthesizer>